Connect Four (also known as Connect 4, Four Up, Plot Four, Find Four, Captain's Mistress, Four in a Row, Drop Four, and in the Soviet Union, Gravitrips) is a game in which the players choose a color and then take turns dropping colored tokens into a six-row, seven-column vertically suspended grid. The pieces fall straight down, occupying the lowest available space within the column. The objective of the game is to be the first to form a horizontal, vertical, or diagonal line of four of one's own tokens. It is therefore a type of m,n,k-game (7, 6, 4) with restricted piece placement. Connect Four is a solved game; the first player can always win by playing the right moves.

The game was created by Howard Wexler, and first sold under the Connect Four trademark[10] by Milton Bradley in February 1974.

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